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A variable-weather-parameter MPPT method based on a defined characteristic resistance of photovoltaic cell

机译:基于已定义的光伏电池特征电阻的变天气参数MPPT方法

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摘要

A characteristic resistance of photovoltaic (PV) cell is defined in this paper to find the mathematical equation of the control signal at the maximum power point (MPP) and to obtain the maximum power point tracking (MPPT) constraint conditions. Based on it, a variable-weather-parameter (VWP) MPPT method is proposed. The major purpose is to greatly improve the MPPT speed and make the design of PV system more convenient. By this method, the real-time value of the control signal at the MPP can be directly calculated. Meanwhile, the topology of PV system can be conveniently selected by the proposed MPPT constraint conditions. Finally, some simulations whose models are built by MATLAB software are done. Results show that the proposed MPPT constraint conditions is accurate regardless of the solar irradiance or temperature, verify that the proposed method is feasible, available and accurate to track the MPP successfully, and illustrate that there is a better MPPT performance than the perturbation and observation (P&O) method under fast changing weather conditions.
机译:本文定义了光伏电池的特征电阻,以找到最大功率点(MPP)处控制信号的数学方程式,并获得最大功率点跟踪(MPPT)约束条件。在此基础上,提出了一种变天气参数MPPT方法。主要目的是大大提高MPPT速度,并使光伏系统的设计更加方便。通过这种方法,可以直接计算MPP处控制信号的实时值。同时,通过提出的MPPT约束条件可以方便地选择光伏系统的拓扑结构。最后,完成了一些由MATLAB软件建立模型的仿真。结果表明,无论太阳辐照度或温度如何,提出的MPPT约束条件都是准确的,证明了该方法可行,可用且准确地成功跟踪了MPP,并说明了MPPT的性能要优于扰动和观察( P&O)方法,以适应快速变化的天气条件。

著录项

  • 来源
    《Solar Energy》 |2020年第3期|673-684|共12页
  • 作者

  • 作者单位

    Hubei Minzu Univ Sch Informat Engn Enshi Peoples R China;

    Shenyang Inst Technol Liaoning Key Lab Informat Phys Fus & Intelligent Shenyang Liaoning Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    MPPT; PV system; MPP; VWP; Characteristic resistance;

    机译:MPPT;光伏系统MPP;VWP;特性电阻;

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